1) Which country produces the most oxygen for the world? a) India b) Japan c) Russia 2) Where is Nauru located? a) Sea coast of Jamaica b) West coast of Africa c) Central Pacific, Micronesia. 3) Which is the cleanest country in the world? a) Denmark b) Switzerland c) Spain 4) Which country has the highest density of vending machines? a) India b) Japan c) Portugal 5) Which city is Cristiano Ronaldo from? a) Lisbon b) Evora c) Faro d) Funchal

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